Ummmm.... Jeff ? A 318 with a 4" arm is not a 318 anymore..... your wheels on your cuda is like putting a 4bbl on a 318, still a 318. You can say you have a stroker 318. You can say it's a 318 stroked. But 318 is the cubic inches made up of bore and stroke. when you move the stroke from 3.31 to 4", you moved the cubic inches from 318 to 390.
